349 lines
11 KiB
PHP
349 lines
11 KiB
PHP
<?php
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/**
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* WordPress eXtended RSS file parser implementations
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*
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* @package WordPress
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* @subpackage Importer
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*/
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/**
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* WXR Parser that uses regular expressions. Fallback for installs without an XML parser.
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*/
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class WXR_Parser_Regex {
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public $authors = array();
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public $posts = array();
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public $categories = array();
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public $tags = array();
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public $terms = array();
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public $base_url = '';
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public $base_blog_url = '';
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public $has_gzip;
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function __construct() {
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$this->has_gzip = is_callable( 'gzopen' );
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}
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function parse( $file ) {
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$wxr_version = false;
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$in_multiline = false;
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$multiline_content = '';
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$multiline_tags = array(
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'item' => array( 'posts', array( $this, 'process_post' ) ),
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'wp:category' => array( 'categories', array( $this, 'process_category' ) ),
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'wp:tag' => array( 'tags', array( $this, 'process_tag' ) ),
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'wp:term' => array( 'terms', array( $this, 'process_term' ) ),
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);
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$fp = $this->fopen( $file, 'r' );
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if ( $fp ) {
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while ( ! $this->feof( $fp ) ) {
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$is_tag_line = false;
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$importline = rtrim( $this->fgets( $fp ) );
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if ( ! $wxr_version && preg_match( '|<wp:wxr_version>(\d+\.\d+)</wp:wxr_version>|', $importline, $version ) ) {
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$wxr_version = $version[1];
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}
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if ( false !== strpos( $importline, '<wp:base_site_url>' ) ) {
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preg_match( '|<wp:base_site_url>(.*?)</wp:base_site_url>|is', $importline, $url );
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$this->base_url = $url[1];
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continue;
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}
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if ( false !== strpos( $importline, '<wp:base_blog_url>' ) ) {
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preg_match( '|<wp:base_blog_url>(.*?)</wp:base_blog_url>|is', $importline, $blog_url );
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$this->base_blog_url = $blog_url[1];
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continue;
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} elseif ( empty( $this->base_blog_url ) ) {
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$this->base_blog_url = $this->base_url;
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}
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if ( false !== strpos( $importline, '<wp:author>' ) ) {
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preg_match( '|<wp:author>(.*?)</wp:author>|is', $importline, $author );
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$a = $this->process_author( $author[1] );
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$this->authors[ $a['author_login'] ] = $a;
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continue;
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}
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foreach ( $multiline_tags as $tag => $handler ) {
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// Handle multi-line tags on a singular line
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$pos = strpos( $importline, "<$tag>" );
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$pos_closing = strpos( $importline, "</$tag>" );
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if ( preg_match( '|<' . $tag . '>(.*?)</' . $tag . '>|is', $importline, $matches ) ) {
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$this->{$handler[0]}[] = call_user_func( $handler[1], $matches[1] );
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} elseif ( false !== $pos ) {
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// Take note of any content after the opening tag
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$multiline_content = trim( substr( $importline, $pos + strlen( $tag ) + 2 ) );
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// We don't want to have this line added to `$is_multiline` below.
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$in_multiline = $tag;
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$is_tag_line = true;
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} elseif ( false !== $pos_closing ) {
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$in_multiline = false;
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$multiline_content .= trim( substr( $importline, 0, $pos_closing ) );
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$this->{$handler[0]}[] = call_user_func( $handler[1], $multiline_content );
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}
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}
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if ( $in_multiline && ! $is_tag_line ) {
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$multiline_content .= $importline . "\n";
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}
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}
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$this->fclose( $fp );
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}
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if ( ! $wxr_version ) {
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return new WP_Error( 'WXR_parse_error', __( 'This does not appear to be a WXR file, missing/invalid WXR version number', 'wordpress-importer' ) );
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}
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return array(
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'authors' => $this->authors,
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'posts' => $this->posts,
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'categories' => $this->categories,
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'tags' => $this->tags,
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'terms' => $this->terms,
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'base_url' => $this->base_url,
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'base_blog_url' => $this->base_blog_url,
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'version' => $wxr_version,
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);
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}
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function get_tag( $string, $tag ) {
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preg_match( "|<$tag.*?>(.*?)</$tag>|is", $string, $return );
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if ( isset( $return[1] ) ) {
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if ( substr( $return[1], 0, 9 ) == '<![CDATA[' ) {
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if ( strpos( $return[1], ']]]]><![CDATA[>' ) !== false ) {
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preg_match_all( '|<!\[CDATA\[(.*?)\]\]>|s', $return[1], $matches );
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$return = '';
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foreach ( $matches[1] as $match ) {
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$return .= $match;
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}
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} else {
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$return = preg_replace( '|^<!\[CDATA\[(.*)\]\]>$|s', '$1', $return[1] );
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}
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} else {
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$return = $return[1];
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}
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} else {
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$return = '';
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}
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return $return;
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}
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function process_category( $c ) {
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$term = array(
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'term_id' => $this->get_tag( $c, 'wp:term_id' ),
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'cat_name' => $this->get_tag( $c, 'wp:cat_name' ),
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'category_nicename' => $this->get_tag( $c, 'wp:category_nicename' ),
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'category_parent' => $this->get_tag( $c, 'wp:category_parent' ),
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'category_description' => $this->get_tag( $c, 'wp:category_description' ),
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);
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$term_meta = $this->process_meta( $c, 'wp:termmeta' );
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if ( ! empty( $term_meta ) ) {
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$term['termmeta'] = $term_meta;
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}
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return $term;
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}
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function process_tag( $t ) {
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$term = array(
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'term_id' => $this->get_tag( $t, 'wp:term_id' ),
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'tag_name' => $this->get_tag( $t, 'wp:tag_name' ),
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'tag_slug' => $this->get_tag( $t, 'wp:tag_slug' ),
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'tag_description' => $this->get_tag( $t, 'wp:tag_description' ),
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);
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$term_meta = $this->process_meta( $t, 'wp:termmeta' );
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if ( ! empty( $term_meta ) ) {
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$term['termmeta'] = $term_meta;
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}
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return $term;
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}
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function process_term( $t ) {
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$term = array(
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'term_id' => $this->get_tag( $t, 'wp:term_id' ),
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'term_taxonomy' => $this->get_tag( $t, 'wp:term_taxonomy' ),
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'slug' => $this->get_tag( $t, 'wp:term_slug' ),
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'term_parent' => $this->get_tag( $t, 'wp:term_parent' ),
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'term_name' => $this->get_tag( $t, 'wp:term_name' ),
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'term_description' => $this->get_tag( $t, 'wp:term_description' ),
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);
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$term_meta = $this->process_meta( $t, 'wp:termmeta' );
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if ( ! empty( $term_meta ) ) {
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$term['termmeta'] = $term_meta;
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}
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return $term;
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}
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function process_meta( $string, $tag ) {
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$parsed_meta = array();
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preg_match_all( "|<$tag>(.+?)</$tag>|is", $string, $meta );
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if ( ! isset( $meta[1] ) ) {
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return $parsed_meta;
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}
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foreach ( $meta[1] as $m ) {
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$parsed_meta[] = array(
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'key' => $this->get_tag( $m, 'wp:meta_key' ),
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'value' => $this->get_tag( $m, 'wp:meta_value' ),
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);
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}
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return $parsed_meta;
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}
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function process_author( $a ) {
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return array(
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'author_id' => $this->get_tag( $a, 'wp:author_id' ),
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'author_login' => $this->get_tag( $a, 'wp:author_login' ),
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'author_email' => $this->get_tag( $a, 'wp:author_email' ),
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'author_display_name' => $this->get_tag( $a, 'wp:author_display_name' ),
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'author_first_name' => $this->get_tag( $a, 'wp:author_first_name' ),
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'author_last_name' => $this->get_tag( $a, 'wp:author_last_name' ),
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);
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}
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function process_post( $post ) {
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$post_id = $this->get_tag( $post, 'wp:post_id' );
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$post_title = $this->get_tag( $post, 'title' );
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$post_date = $this->get_tag( $post, 'wp:post_date' );
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$post_date_gmt = $this->get_tag( $post, 'wp:post_date_gmt' );
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$comment_status = $this->get_tag( $post, 'wp:comment_status' );
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$ping_status = $this->get_tag( $post, 'wp:ping_status' );
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$status = $this->get_tag( $post, 'wp:status' );
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$post_name = $this->get_tag( $post, 'wp:post_name' );
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$post_parent = $this->get_tag( $post, 'wp:post_parent' );
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$menu_order = $this->get_tag( $post, 'wp:menu_order' );
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$post_type = $this->get_tag( $post, 'wp:post_type' );
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$post_password = $this->get_tag( $post, 'wp:post_password' );
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$is_sticky = $this->get_tag( $post, 'wp:is_sticky' );
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$guid = $this->get_tag( $post, 'guid' );
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$post_author = $this->get_tag( $post, 'dc:creator' );
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$post_excerpt = $this->get_tag( $post, 'excerpt:encoded' );
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$post_excerpt = preg_replace_callback( '|<(/?[A-Z]+)|', array( &$this, '_normalize_tag' ), $post_excerpt );
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$post_excerpt = str_replace( '<br>', '<br />', $post_excerpt );
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$post_excerpt = str_replace( '<hr>', '<hr />', $post_excerpt );
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$post_content = $this->get_tag( $post, 'content:encoded' );
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$post_content = preg_replace_callback( '|<(/?[A-Z]+)|', array( &$this, '_normalize_tag' ), $post_content );
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$post_content = str_replace( '<br>', '<br />', $post_content );
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$post_content = str_replace( '<hr>', '<hr />', $post_content );
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$postdata = compact(
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'post_id',
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'post_author',
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'post_date',
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'post_date_gmt',
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'post_content',
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'post_excerpt',
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'post_title',
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'status',
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'post_name',
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'comment_status',
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'ping_status',
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'guid',
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'post_parent',
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'menu_order',
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'post_type',
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'post_password',
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'is_sticky'
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);
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$attachment_url = $this->get_tag( $post, 'wp:attachment_url' );
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if ( $attachment_url ) {
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$postdata['attachment_url'] = $attachment_url;
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}
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preg_match_all( '|<category domain="([^"]+?)" nicename="([^"]+?)">(.+?)</category>|is', $post, $terms, PREG_SET_ORDER );
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foreach ( $terms as $t ) {
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$post_terms[] = array(
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'slug' => $t[2],
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'domain' => $t[1],
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'name' => str_replace( array( '<![CDATA[', ']]>' ), '', $t[3] ),
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);
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}
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if ( ! empty( $post_terms ) ) {
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$postdata['terms'] = $post_terms;
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}
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preg_match_all( '|<wp:comment>(.+?)</wp:comment>|is', $post, $comments );
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$comments = $comments[1];
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if ( $comments ) {
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foreach ( $comments as $comment ) {
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$post_comments[] = array(
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'comment_id' => $this->get_tag( $comment, 'wp:comment_id' ),
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'comment_author' => $this->get_tag( $comment, 'wp:comment_author' ),
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'comment_author_email' => $this->get_tag( $comment, 'wp:comment_author_email' ),
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'comment_author_IP' => $this->get_tag( $comment, 'wp:comment_author_IP' ),
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'comment_author_url' => $this->get_tag( $comment, 'wp:comment_author_url' ),
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'comment_date' => $this->get_tag( $comment, 'wp:comment_date' ),
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'comment_date_gmt' => $this->get_tag( $comment, 'wp:comment_date_gmt' ),
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'comment_content' => $this->get_tag( $comment, 'wp:comment_content' ),
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'comment_approved' => $this->get_tag( $comment, 'wp:comment_approved' ),
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'comment_type' => $this->get_tag( $comment, 'wp:comment_type' ),
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'comment_parent' => $this->get_tag( $comment, 'wp:comment_parent' ),
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'comment_user_id' => $this->get_tag( $comment, 'wp:comment_user_id' ),
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'commentmeta' => $this->process_meta( $comment, 'wp:commentmeta' ),
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);
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}
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}
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if ( ! empty( $post_comments ) ) {
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$postdata['comments'] = $post_comments;
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}
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$post_meta = $this->process_meta( $post, 'wp:postmeta' );
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if ( ! empty( $post_meta ) ) {
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$postdata['postmeta'] = $post_meta;
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}
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return $postdata;
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}
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function _normalize_tag( $matches ) {
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return '<' . strtolower( $matches[1] );
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}
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function fopen( $filename, $mode = 'r' ) {
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if ( $this->has_gzip ) {
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return gzopen( $filename, $mode );
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}
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return fopen( $filename, $mode );
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}
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function feof( $fp ) {
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if ( $this->has_gzip ) {
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return gzeof( $fp );
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}
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return feof( $fp );
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}
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function fgets( $fp, $len = 8192 ) {
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if ( $this->has_gzip ) {
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return gzgets( $fp, $len );
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}
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return fgets( $fp, $len );
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}
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function fclose( $fp ) {
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if ( $this->has_gzip ) {
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return gzclose( $fp );
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}
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return fclose( $fp );
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}
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}
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